摘要
近数十年来 ,鲁南海岸持续侵蚀 ,与 2 0世纪 6 0年代相比 ,该段岸线平均蚀退率 1m /a左右 ,海滩沙侵蚀量约 2 0 .79× 10 4m3/a。其中 ,近 2 8年陆源输沙平均减少 6 .47× 10 4m3/a,人为前滨采沙 8.9× 10 4m3/a,海平面上升引起海滩侵蚀量约为 1.6 7× 10 4m3/a,该三因素影响力度之比为 4∶ 5∶
The southern Shandong sandy coast has been experiencing continuous erosion since 1960s.Average shoreline retreating rate is about 1m/a according to profiles monitored along the studied coast.This continuous erosion is a combined result of multi elements that work on the studied coast.Gross sediments losses of the coast are about 20 79×10 4 m 3/a on the basis of long term profile measurement,among them,reduction of river sediments discharge is around 6 47×10 4 m 3/a,sediments loss caused by sand mining from beach is above 8 9×10 4 m 3/a,and 1 67×10 4 m 3/a beach sediments loss is caused by sea level rising according to Bruun Rule.On the basis of power analysis,reduction of sediment discharge from rivers,sand mining from beach and sea level rising account for 4∶5∶1 of the total coastal erosion respectively.Difference of sand losses between the measured and calculated results is induced by either limited profile monitoring records or uncertainty of sediment loss estimation.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2000年第3期15-21,共7页
Marine Geology & Quaternary Geology
基金
国家"九五"攻关!96-92 2 -0 3号专题资助
同济大学海洋地质教育部重点实验室资助
关键词
海岸蚀退
海滩沙
海岸
侵蚀量
山东
coast erosion
beach sand
influencing factor
southern Shandong coast
